Table 1 Comparison of caffeine intake and mobile phone use between cases versus controls
Group | Mean rank % | Sum of ranks | P value |
|---|---|---|---|
Caffeine intake | |||
Controls | 38.84 | 1204.00 | 0.060 |
Cases | 48.29 | 2801.00 | |
Mobile phone usage | |||
Controls | 38.97 | 1208.00 | 0.084 |
Cases | 48.22 | 2797.00 | |